Stopping means of talking machines



Sept. 25, 1928. 1,685,471

E. N. WATERWORTH STOPPING MEANS OF TALKING MACHINES Filed Dec. 15, 1927 Waflrrror 7'4,

Patented Sept. 25, 1928.

UNITED STATES PATENT OFFICE.

STOPPING MEANS OF TALKING MACHINES.

Application filed December 15, 1927, Serial No. 240,278, and in Australia. February 11, 1927.

This invention relates to selfacting stopping means of talking machines accordingto and as described in my specification lodged with Serial Number 131,045.

In that specfication there .is described a machine wherein a pivotal member is intermittently moved into a position to actuate the turntable stopping means and is withdrawn therefrom by the movement over the sound record of the tonearm until the movement of the tonearm ceases when the pivotal member is held and the machine motor, as itcontinues to rotate, operates means to release a braking device.

This invention provides for actuating the machine stopping means through a pivotal member on which is a latch the movements of which are controlled from a pallet wheel while the tonearm is moving across a record. Vhen the tonearm stops the pivotal member, hereinattercalled the pallet lever, becomes locked through a latch and the machine motor, as it continues to rotate, actuates means to stop the machine.

The latch acts in concert with a latch pin on a rod the movements of which are regulated by frictional contact with a member moved by the tonearm while the record is being played to cause the latch pin to avoid locking the latch during the playing of a record, but which pin is adapted, when the movement of the tonearm ceases, to be locked with the latch and to hold the pallet lever in such position that the continually revolving 5 motor rocks a plate to operate the stopping means. V 7 7 p In the accompanying drawings,

Fig. 1 shows in plan view the disposition of the parts in a talking machine operated by an electric motor.

Fig. 2 is a perspective view in detail of the latch member and coordinating parts, and

Fig. 3 is a like view ofthe pallet lever.

From the base of the tonearm 4, a bar 5 projects and moves with the tonearm. On the end of the bar is an upstanding stud 6. Mounted pivotallv at 8 on the machine base is a. plate 7 which has a camrace 9. The plate 7 has a curved edge leading into the race and the plate is set slightly above the bar 5,

in orderthat, at the beginning of the playing of a record, the stud will bear against the curved edge 10 as the tonearm swings. As the radius of the curr ed edge is in that of the tonearm no movement of the plate will occur until the tonearm has moved far enough.

for the stud 6 to enter the race 9 and make contact with its opposite edge. When this 00- curs the plate will begin to move forward about its axis, the movement of the plate at the same time being steadied by contact with the flat spring 13 that bears against the periphery of the plate in case of the oscillation of the pin 6 in the race 9 due to the passage of the tonearm over incorrectly centred records.

Pivotally and trictionally attached to the plate 7 concentric with its centre 8 is a light rod 11 that extends inwardly first with a downward bend 12, then through an opening in a plate 13, and terminates with a downward projection 14. Near the inner end on the rod a latch pin 15 is secured, while the pallet lever 25 is arranged just above the pallet wheel 18 under the rod 11. f i

The motor is on the spindle 16 on which is keyed the spur pinion l7 that meshes with the pallet wheel 18 on a spindle 19 that is mounted on a rocking plate 20 that can pivot on the motor spindle 16. On the pallet wheel 18 is a post 21 and a cam 22. The rocking plate 20 is kept in normal position by a spring 23 and on the rocking plate 20 is a pawl 24.

Pivotally mounted near the pallet wheel 18 is the pallet lever 25 on which two levers are pivotally mounted, one being the latch lever 26 and the other the tooth lever 27 that in the sequence of events is engaged by the stud 21. On the latch lever the side is turned up at 28 and the end at 29, while on the pallet lever 25 one edge is turned up or stepped at 30. Against the upper part of the step the latch lever normally rests and the tooth lever lies normally against the lower part of the step the levers beingkept in the respective positions by suitable tension springs. I u

A setting dial 31 is provided for operating the machine and to a crank member on'the spindle of the dial a connecting rod 32 1s attached at one end and at the other to a notched plate 33 pivoted at 34. Near the plate abell crank 35 is pivoted at 36 and connected to a tension spring 37 that normally keeps it clear of the switch 38 that is in the motor circuit. On the other end of the bell. crank is a stud 39. When the dial is moved to the on position the plate 33 contacts with the stud and rocks the bell crank to cut in the switch to start the motor.

The plate 33 is provided with two notches one in which the pawl 24 can engage and the other over whichthe stud 39 can repose, the

stud being of' a diameter greater than the width of the notch. A pin 11 is against the pawl 24 that keeps it away from the notch till rocked as hereinafter described.

Referring now to the plate 7, the inward edge of this is are shaped and terminates at the end of the are shaped edge in a slightly raisedplatform 40. On the bracket 13 the fiat spring 18 is mounted and bears on the arcplate edge to steady its progress under the influence of the tonearm. The plate is engaged by the pin 6 which, as it moves in the race 9, carries the plate with it about its axis 8. The rod 11 is frictionally held to the spin dle ofthe plate by the spring 45, that is-adjustable' and the rod is made to lightly contact at the opposite side of the plate through the liin'ked member 12. As will be hereintioning by the presence of the kinlred member 12 inthe rod 11 upon theplatformj ld In this'position the lug 29 on the latch member cannot engage with the pin 15. As the playing proceeds, the stud 6 on the. bar 5 on the tonearm moves along the curve 10 on the plate 7 which meanwhile is stationary against the stud 42. When the stud 6 comes into the camrace 9 the plate 7 will commence to move with the arm and the platform 10 I will move from under the rod and the member 12 will continue in contact therewith in a lower position relatively to the latchmemher 26; I,

Meanwhile, the motor is revolving pallet wheel 18' through pinion 17 in the direction ofithearrow. I At veachrevolution of 18 the cam 22 is'brought into contact with the edge of the latch 26, that slightly overlaps the inwardly curving edge of thepallet'lever 25, to rock it to approximately the positionshown U in Fig. 2, relatively to the latch pin 15.

The cam then engages the tip of the pallet lever'25 and causes it toswing about its pivotca'rrying with it the latch and the tooth lever-.27. As the cam proceeds the latch 26 is permitted to resume its normal position 7 against stopv 30 and the cam brushes past the tip'of the pallet lever which is released and resumes the normal position with the member 29 at front of the pin 15; Thecam next and immediately{engages the turned down end 14; of the rod ll causing the pin 15 with it to swing immediately behind the-lug 29. If the rod 11 remains in this position, at the next revolution of the wheel 18 the cam will again rock the latch and pallet lever to bring the lug 29 behind 15, when it'will become latched with 15 to retain the lever 25 in stop actuating position. While the record is being played and the plate 7 is constantly moving this position is avoided by the fact that'when the cam moves the rod over the frictional contact between the rod and the plate 7 moving in an opposite direction returns the rod immediately to its former-position. lVhen, however, the playing ceases andthe tonearm and plate 7 become stationary the lug 29 is moved into position behind the pin 15 in the way explained and comes to rest against the pin. In thisposition'the pallet lever has been rocked and the tooth on the lever'27' is in place to be engaged by the stud 21- as the wheel 18 rotates. The stud after engaging the tooth rocks the lever 2'Y'with the pallet lever25 and this causes the plate 20 to swing with the pawl 24, that enters the notch in the plate 33. As the plate 20 continues to move the pawl will rock i the plate 33 sufficiently to cause the outer notch in same to slip past the stud 39. At the same time the lug 4A on the plate 20 comes into the step43 on plate 33 and the pallet lever is further rocked: as it does so the lug 28 on the latch 26 impinges on the part 15 to push the rod 11 out of the way to permit the latch lug 29 to return past 15. 1 As the wheel 18' continues the pallet lever 25 is freed and rocks back when lug 1 1 is freed from step 13 and studo89 allowed to slip down the inclined plate 33, the spring reacts to open the switch and the movement of all parts ceases with the stopping of the motor. 7

It will be obvious that, instead of the switch 38, the rocking of the lever 35 may be used to apply breaking means to the record turntable in almanner similar to that already indicated in my previous specification. 1

' I Having now described my invention what I claim as newand desire to secure by Letters Patent is: i i

1. In stopping means in talkingmachines having a pallet wheel rotated by the machine motor and mounted on a plate adapted to be rocked about the axis of the motor spindle to actuate the stopping means, a pallet lever and a latch member 'pivotally mounted thereon that are intermittently rocked independently and together while the 'tonearm is moving and in whichwhen the movement of the tonearm ceases the latch member becomes locked to allow the'stopping means to function.

2. In stopping means in talking machines having a pallet wheel rotated by the machine motor and mounted on a plate adapted to be rocked about the axis of the motor spindle to actuate the stopping means, a pallet lever and a latch member pivotally mounted thereon that are intermittently rocked independently and together while the tonearm is movmg and in which when the movement of the tonearm ceases the latch member becomes locked to allow the stopping means to function, a pivotally mounted plate adapted to be rotated by the tonearm, a latching rod frictionally connected to said plate the movements of the rod being regulated alternately through said plate and the pallet wheel.

3. In stopping means in talking machines, a motor and a tonearm, a pivotally mounted plate adapted to be rotated by said arm, alatching rod that is :lrictionally connect-ed to the plate, a rotatable pallet wheel, a. pallet lever and a latching lever on said pallet lever, means for rocking said latching andpallet levers to lock the latching lever with the latching rod to permit the stopping means to function and a means for resisting the backward movement of the pivotally mounted late. I p 4. In stopping means in talking machines, a motor and a tonearm, a pivotally mounted plate adapted to be rotated by said arm, a

latching rod that is frictionally connected to the member, a rotatable pallet wheel, a pallet lever and a latching lever on said pallet lever, means for rocking said latching and pallet levers to lock the latching lever with the latching rod, and means on the pallet wheel to engage with and rock the plate about the axis of the motor spindle.

5. In stopping means in talking machines having a pallet wheel rotated by the machine motor and mounted on a plate adapted to be rocked about the axis of the motor spindle to actuate the stopping means, a pallet lever and a latch member pivotally mounted thereon that are intermittently rocked independently and together while the tonearm is moving and in which when the movement of the tonearm ceasesthe latch member becomes locked to allow the stopping means to func tion, a setting dial, a notched plate set by the dial. a switch lever actuated through the notched plate, a pawl on the rockable plate. the switch being opened through the dial and closed by the selfacting mechanism connected through said pawl, as herein specified.

6. In stopping means in talking machines having a pallet wheel rotated by the machine motor and mounted on a plate adapted to be rocked about the axis of the motor spindle to actuate the stopping means, a pivotally mounted pallet lever and a latch member pivotally mounted thereon that are intermittently rocked independently and together while the tonearm is moving and in which when the movement of the tonearm ceases the latch member becomes locked to allow the stopping means to function, a tonearm, a pivotally mounted plate adapted to be rotated through the arm, a tooth lever on the pallet lever rockable thereon, a pallet wheel rotated from the machine motor, a cam and a stud on the pallet wheel that is on the plate adapted to be rocked and means whereby when the movement of the tonearm ceases the latch lever is locked and the pallet lever and tooth lever canted for the tooth to be engaged by the pallet wheel to rock the plate, as and for the purposes specified.

7. In stopping means in talking machines wherein a latching rod is adapted to be locked with a latching lever and is frictionally connected to a plate moved by the tonearm, a pallet wheel, a downward kink in the rod, a latch pin on the same, a downwardly turned finger on its outer end that is intermittently engaged by the pallet wheel and a friction spring bearing against the pivotally mounted plate.

8. In stopping means in talking machines wherein a plate is adapted to be rotated by the tonearm and wherein a latching rod is ada ted to be locked with a latching lever an is frictionally connected to a plate moved by the tonearm, a pallet wheel, a downward kink in the rod, a latch pin on the same, a downwardly turned finger on its outer end that is intermittently engaged by the pallet wheel, a friction spring bearing against the pivotally mounted plate, a bar on the tonearm base, a stud on the bar, a pivotally mounted plate, a camrace therein engageable by the stud, a platform on one extremity of said plate on which the kink in the rod rests prior to the commencement of the playing of a record and while the same is revolving, as and for the purposes specified.

9. In stopping means in talking machines,

a machine motor, a tonearm, a slotted plate adapted to be rotated from thetonearm, a pallet wheel, a pallet lever, a latching lever anda tooth lever on the pallet lever, a cam and a stud on the pallet wheel. a latching rod frictionally connected to the plate, a latch pin on the rod adapted to be locked with the latching lever, a rocking plate, a pawl thereon, a setting dial, a notched plate adjusted by the setting dial and that is engaged by the pawl when the latch is closed and the plate is rocked, a lever normally resting on the notched plate and a motor switch adapted to be opened when the pawl is applied to rock the notched plate.

In testimony whereof I affix my signature.

ERIC N. WATERWORTH. 

